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AD5412:  Single Channel, 12-Bit, Serial Input, Current Source & Voltage Output DAC

The AD5412/AD5422 are low-cost, precision, fully integrated 12-/16-bit digital-to-analog converters (DAC) offering a pro-grammable current source and programmable voltage output designed to meet the requirements of industrial process control applications.

The output current range is programmable at 4 mA to 20 mA, 0 mA to 20 mA, or an overrange function of 0 mA to 24 mA.

Voltage ...More

AD5412:  Single Channel, 12-Bit, Serial Input, Current Source & Voltage Output DAC

Product Description

The AD5412/AD5422 are low-cost, precision, fully integrated 12-/16-bit digital-to-analog converters (DAC) offering a pro-grammable current source and programmable voltage output designed to meet the requirements of industrial process control applications.

The output current range is programmable at 4 mA to 20 mA, 0 mA to 20 mA, or an overrange function of 0 mA to 24 mA.

Voltage output is provided from a separate pin that can be configured to provide 0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V output ranges; an overrange of 10% is available on all ranges.

Analog outputs are short and open-circuit protected and can drive capacitive loads of 1 μF.

The device operates with an AVDD power supply range from 10.8 V to 40 V. Output loop compliance is 0 V to AVDD – 2.5 V.

The flexible serial interface is SPI- and MICROWIRE™-compatible and can be operated in 3-wire mode to minimize the digital isolation required in isolated applications.

The device also includes a power-on-reset function, ensuring that the device powers up in a known state. The part also includes an asynchronous clear pin (CLEAR) that sets the outputs to zero-scale/midscale voltage output or the low end of the selected current range.

The total output error is typically ±0.01% in current mode and ±0.01% in voltage mode.

Applications

  • Process Control
  • Actuator Control
  • PLC

Data Sheet, Rev. A, 9/09

RESOURCES & TOOLS

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  • 12-/16-bit resolution and monotonicity
  • Current output ranges: 4 mA to 20 mA, 0 mA to 20 mA,
    0 mA to 24 mA
    ±0.01 % FSR typical total unadjusted error (TUE)
    ±3 ppm/°C output drift
  • Voltage output ranges: 0 V to 5 V, 0 V to 10 V, ±5 V, ±10 V
    10% overrange
    ±0.01 % FSR typical total unadjusted error (TUE)
    ±2 ppm/°C output drift
  • Flexible serial digital interface
  • On-chip output fault detection
  • On-chip reference: 10 ppm/°C maximum
  • Asynchronous clear function
  • Power supply range
    AVDD: 10.8 V to 40 V
    AVSS: −26.4 V to −3 V/0 V
  • Output loop compliance: AVDD – 2.5 V
  • Temperature range: −40°C to +85°C
  • TSSOP and LFCSP packages
  • Resolution (Bits): 12bit
  • DAC Update Rate: 40kSPS
  • DAC Settling Time: 18µs
  • # DAC Outputs: 1
  • DAC Type: I or V Out
  • DAC Input Format: Ser,SPI
  • Output FSR: (0-20mA),(0-24mA),(4-20mA),(Bip 10V),(Bip 5V),(Uni 10V),(Uni 5V)
  • Ref Int/Ext: Int/Ext
  • Supply Vnom: Multi(+12An, +3 to+5Dig),Multi(+15, +5Dig),Multi(±12An, +3 to+5Dig),Multi(±15, +3.3Dig) ,Multi(±15, +3Dig),Multi(±15, +5Dig)
  • Pwr Diss: 158mW
  • Package: SOP

AD5412 Functional Block Diagram

Circuits from the Lab

Find more at our Circuits Library.

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